PHP | mysqli_stmt_param_count() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP mysqli_stmt_param_count() Function.

The PHP mysqli_stmt_param_count() function accepts a prepared statement object as a parameter and then returns the number of parameter markers in it.

Syntax

Following below is the syntax to use this function -

mysqli_stmt_param_count($stmt);

READ: PHP | mysqli_stmt_num_rows() Function

Parameter Details

Sr.No	Parameter & Description
1	stmt(Mandatory) This is an object representing a statement executing an SQL query.

Return Value

This PHP function returns an integer value which indicates the number of parameter markers in the given prepared statement.

PHP Version

This built-in PHP function was first introduced in PHP version 5 and works in all the later versions.

Example1

Assuming we have created a table named employee in the MYSQL database with the following contents $minus;

mysql> select * from employee;
+------------+--------------+------+------+--------+
| FIRST_NAME | LAST_NAME    | AGE  | SEX  | INCOME |
+------------+--------------+------+------+--------+
| Kennedy    | Nkpara       |   27 | M    |  21000 |
| Paul       | Francis      |   30 | M    |  23300 |
| Stephanie  | Francis      |   24 | F    |  51000 |
| Justice    | Donald       |   28 | M    |   2256 |
| Precious   | Amah         |   25 | F    |  15000 |
+------------+--------------+------+------+--------+
5 rows in set (0.00 sec)

The following below is an example which demonstrates the usage of the built-in PHP mysqli_stmt_param_count() function (in a procedural style) -

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   $stmt = mysqli_prepare($con, "UPDATE employee set INCOME=INCOME-? where INCOME>=?");
   mysqli_stmt_bind_param($stmt, "si", $reduct, $limit);
   $limit = 20000;
   $reduct = 5000;

   //Executing the statement
   mysqli_stmt_execute($stmt);
   print("Records Updated......\n");

   //Affected rows
   $count = mysqli_stmt_param_count($stmt);

   //Closing the statement
   mysqli_stmt_close($stmt);

   //Closing the connection
   mysqli_close($con);

   print("Rows affected ".$count);
?>

Output

When the above code is executed, it will produce the following result -

Records Updated......
Rows affected 3

Example2

In an object oriented style the syntax of this function is $stmt->param_count(); Following is the example of this function in an object oriented style -

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   $con -> query("CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created.....\n");

   $stmt = $con -> prepare( "INSERT INTO myplayers values(?, ?, ?, ?, ?)");
   $stmt -> bind_param("issss", $id, $fname, $lname, $pob, $country);
   $id = 1;
   $fname = 'Kennedy';
   $lname = 'Nkpara';
   $pob = 'PortHarcourt';
   $country = 'Nigeria';

   //Executing the statement
   $stmt->execute();

   //Affected rows
   $count = $stmt ->param_count;
   print("Number of parameters: ".$count);

   //Closing the statement
   $stmt->close();

   //Closing the connection
   $con->close();
?>

Output

When the above code is executed, it will produce the following result -

Table Created.....
Records Deleted.....
Number of parameters: 5

READ: PHP | mysqli_stmt_free_result() Function

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP mysqli_stmt_prepare() Function.

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